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From the image you shared, I can see a set of math exercises related to percentages. Let me break down each problem and provide solutions:

1. **Calculer le pourcentage, arrondi au dixième, de 150 par rapport à 261.**
   - This is asking to calculate the percentage of 150 relative to 261, and round to the nearest tenth.
   - The formula is:

1. Calculer le pourcentage, arrondi au dixième, de 150 par rapport à 261.
2. Calculer 18% de 350; 35% de 500; 30(6)% de 1200.

Practice percentage calculations such as finding the percentage of 150 in relation to 261, and calculating 18% of 350, 35% of 500, and 30(6)% of 1200. This problem set covers key arithmetic skills for students in Grades 6-8.

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